Bristol Myers Squibb Announces Opdivo (nivolumab) plus Chemotherapy and Opdivo plus Yervoy (ipilimumab) Demonstrate Superior Survival Benefit Compared to Chemotherapy in Unresectable Advanced or Metastatic Esophageal Squamous Cell Carcinoma April 8, 2021 by Businesswire [#item_full_content] Related Spread the word